How severe is CVE-2015-2857?

CVE-2015-2857 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-2857 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 84% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2857?

CVE-2015-2857 affects Accellion File Transfer Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-2857?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-2857 published?

CVE-2015-2857 was published on 2017-08-22 and last updated on 2026-06-17.

CVE-2015-2857

CVE-2015-2857 is a critical-severity vulnerability in Accellion File Transfer Appliance with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 84% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 84% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Accellion File Transfer Appliance
Published: 2017-08-22
Last modified: 2026-06-17

Description

Accellion File Transfer Appliance before FTA_9_11_210 allows remote attackers to execute arbitrary code via shell metacharacters in the oauth_token parameter.

Frequently asked questions

What is CVE-2015-2857?: Accellion File Transfer Appliance before FTA_9_11_210 allows remote attackers to execute arbitrary code via shell metacharacters in the oauth_token parameter.
How severe is CVE-2015-2857?: CVE-2015-2857 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-2857 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 84% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2857?: CVE-2015-2857 affects Accellion File Transfer Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-2857?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-2857 published?: CVE-2015-2857 was published on 2017-08-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:accellion:file_transfer_appliance:*:*:*:*:*:*:*:*

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